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有沒有100%的鹽酸？

返回打印发布时间：2023/2/14 点击：7821

鹽酸=HCl水溶液的俗称。HCl不与水以任何比例混溶(H2SO4就够了)，所以没有100%的鹽酸。

下面是两张来自维基百科的图片，其实很清楚。一般来说，鹽酸的最大浓度是38%，这是为了方便摩尔配制。事实上，常温常压下，鹽酸的最高浓度可达41%。38%鹽酸的沸点为48℃，共沸点为110℃。

如果降低温度，在特殊条件下零下20度可以生产出53%左右的浓鹽酸，而在常压下冷冻通常储存在瓶中的鹽酸是没有办法制备出纯HCl的。液體HCl当然有，但不能叫鹽酸。

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